Question

A concave lens has focal length of 12cm. At what distance
should the object be placed from the lens so that it forms an image
8cm from the lens

options

A...U = 24cm
В...u = 5.6cm
C....u = -17.5cm
D....u = -24cm​

Answer 1

Explanation:

Given the magnetic field is given as B(t) = \frac{1.4}{t^2} , the resistance of the wire of the square is 0.35\Omega and side length a = 0.4m . What it is the current of the loop when t = 1.3s?